/* 
 * Integer to Roman
 * Given an integer, convert it to a roman numeral
 * Input is guaranteed to be within the range from 1 to 3999
 */

#include "../func.h"

string intToRoman(int num) {
    const int radix[] = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
    const string symbol[] = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};

    string roman;
    for (size_t i = 0; num > 0; ++i) {
        int count = num / radix[i];
        num %= radix[i];
        for (; count > 0; --count)
            roman += symbol[i];
    }
    return roman;
}